CDC officials say they extended the guidance now because they are seeing more H5N1 patients whose illness they cannot track back to an infected bird or cow.

Officials from the Centers for Disease Control and Prevention recommend that hospitals speed up testing people who are hospitalized with the flu for H5N1 bird flu. Healthcare workers in hospitals

The US Centers for Disease Control and Prevention is urging hospitals to accelerate advanced testing of people they suspect may have bird flu.

The risk to the general public from bird flu is low, and there has been no further evidence of person to person spread, the agency said. Influenza A-positive patients, particularly those in an intensive care unit,